Five Boston firefighters were injured this morning battling a three-alarm blaze on Commercial Wharf.
The fire broke out about 5:15 a.m. and caused $3 million in damage to the two-story law office building.
Two rescue divers went in to the water with a hand line and fought the fire from underneath the dock.
The difficult access and fire pockets under the floor boards resulted in firefighters being on scene for more than four hours putting out the flames.
Fire officials said the cause of the fire was the careless disposal of a
cigarette from an employee who worked late last night and would go to
the second-floor balcony for smoking breaks.
About 75 firefighters responded to the fire.
One firefighter suffered a rib injury. One of the divers was taken to the hospital for smoke inhalation. Two others were also taken for smoke inhalation and a fifth was taken to the hospital with a neck injury.